# LanguageModelError.Refusal Information about a model refusal. ``` struct Refusal ``` ## Overview Refusal failures indicate that the model chose not to respond to a prompt. ## Topics ### Creating an error instance [`init(explanation: String, debugDescription: String, metadata: [String : any Sendable])`](/documentation/FoundationModels/LanguageModelError/Refusal/init(explanation:debugDescription:metadata:)) Creates information describing a model refusal. ### Inspecting refusal errors [`var metadata: [String : any Sendable]`](/documentation/FoundationModels/LanguageModelError/Refusal/metadata) Additional information about the failure, keyed by name. [`var debugDescription: String`](/documentation/FoundationModels/LanguageModelError/Refusal/debugDescription) A debug description to help developers diagnose issues during development. ### Getting a refusal explanation [`var explanation: LanguageModelSession.Response`](/documentation/FoundationModels/LanguageModelError/Refusal/explanation) The model’s explanation for why it refused to generate a response. [`var explanationStream: LanguageModelSession.ResponseStream`](/documentation/FoundationModels/LanguageModelError/Refusal/explanationStream) The model’s explanation for why it refused to generate a response, delivered as it streams. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)